In the video Hitler is seen making speeches to the public of Germany. In his speeches he is seen using very vulgar and emotionally charged words when speaking about attacking other countries and how he plans to take revenge for the attacks they have made. Whatever he says, the Germans are always applauding and cheering for his speeches which tells how he had made the Germans believe that they should fight back and was the right thing to do which thus lead to war between Germany and Europe.
In the picture above it shows Jews on their hands and knees picking up trash from the ground while Nazis watch them from above smiling. This shows that Hilter had brainwashed Germans to belittle Jews and that the Jews are a threat to them so they must not treat them as an equal. Hence because of this mindset the Germans despised the Jews and thus a war occurred because if the tension within the 2 races.
In the political cartoon, Hitler can be seen wearing a pair of sunglasses with the words 'race hate' written on each frame of his glasses. This shows that Hitler was blinded by his racism and is stepping out from the completely destroyed Europe. Hence i can tell from this source that Hitler was the cause of the War in Europe because of his racism and hate towards other races.
The source above shows a picture of Europe after they had been defeated by Germany in the war. In the picture all the buildings are completely destroyed and the scene is a complete mess. This tells me that the European Democracies were useless and could not help protect Europe against the Germans and took no actions to help prevent the war and instead just stood aside and watched everything unfold in front of their faces. Thus i can say that the European Democracies were useless and was responsible for the war in Europe
In the video above it is mentioned that the treaty of versailles was practically useless against Hitler as he had completely ignored it and when the League noticed Hitler misbehaving they did nothing to stop him and instead just stood aside and watched him slowly rise in power even if they had taken actions to stop him, it was very ineffective and was not able to stop Hitler from what he was doing and thus allowed Hitler to continue attacking into Europe which led top the war
This cartoon shows a person crawling out of a scroll of paper labelled 'versailles treaty' and he is wearing a hat with the words ' Hitler Party ' on it. This shows how the treaty of versailles was not efficient in controlling Hitler from rising in power at all and it was fairly easy for Hitler to forgo the treaty and do whatever he wanted to. Because of this Hitler was able to create his own army in Germany and hence lead his army to war which caused war in Europe.